When people search they make mental notes of the rankings for the terms they enter into Google and other search engines. Do not you think in the minds of consumers, your ranking is a vote of confidence? "Google says this business is relevant, so that must be the case." high search rankings make you more credible in their eyes and you get this ranking by the good SEO.
By SEO you can get more traffic, more phone calls from potential clients, and more sales. But the problem is that SEO is no longer a marketing technique used by a few savvy companies. SEO is now the industry standard for any business with an online presence. It is hazardous to ignore SEO. If you don't focus on promoting your business online, it won't be long before one of your competitors pushes you out of the way and you will not like it. Will you?